Detections
Analytics

Mozilla Firefox ESR < 78.4.1

high Nessus Plugin ID 142612

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Synopsis

A web browser installed on the remote macOS or Mac OS X host is affected by a vulnerability.

Description

The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 78.4.1. It is, therefore, affected by a vulnerability as referenced in the mfsa2020-49 advisory.

 - In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. (CVE-2020-26950)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Mozilla Firefox ESR version 78.4.1 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/

Plugin Details

Severity: High

ID: 142612

File Name: macos_firefox_78_4_1_esr.nasl

Version: 1.6

Type: local

Agent: macosx

Published: 11/9/2020

Updated: 3/1/2022

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.7

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2020-26950

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:firefox_esr

Required KB Items: MacOSX/Firefox/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/9/2020

Vulnerability Publication Date: 11/9/2020

Exploitable With

Metasploit (Firefox MCallGetProperty Write Side Effects Use After Free Exploit)

Reference Information

CVE: CVE-2020-26950

IAVA: 2020-A-0531-S

MFSA: 2020-49